All categories

3 years ago

The nearest star to Earth is Proxima Centauri, 4.3 light-years away.

Physics

1 answer:

PIT_PIT [208]3 years ago

7 0

Answer:

a) v = 2,152 10⁸ m / s b) t = 2.71 10⁸ s or t = 85.93 year

Explanation:

a) In this special relativity exercise we have that time is measured in the same ship, so it is the proper time,

v = d / t

Let's reduce the distance to the SI system

d = 4.3 l and (9.46 1015 m / 1ly) = 40.678 10¹⁵ m

t = 5.0 y (365 day / 1 y) (24 h / 1 day) (3600s / 1h) = 1.89 10⁸ s

Let's calculate

v = 40.678 10¹⁵ / 1.89 10⁸

v = 2,152 10⁸ m / s

b) The time seen from the ground for which the ship moves is given by

t = t₀ / √ (1- (v/c)²)

Let's calculate

t = 1.89 10⁸ / √ (1 - (2.152 / 2.998)²)

t = 1.89 10⁸ / 0.6962

t = 2.71 10⁸ s

Let's reduce this time to years

t = 2.71 10⁸ s (1h / 3600s) (1day / 24h) (1 and / 365 d)

t = 85.93 year

You might be interested in

A 2.20 kg mass is at the origin. A

Karolina [17]

Answer:

Explanation:

F1 = G•2.2•4.66/3² (pointed right)

F2 = G•2.2•4.66/3² (pointed left)

subtract the two to get zero

3 0

2 years ago

Read 2 more answers

What happens when sediment builds up over time

Morgarella [4.7K]

When sediment has built up over time layers of rock start to form, starting with sedimentry rocks, then metamorphic rocks

6 0

3 years ago

Read 2 more answers

A gun shoots a bullet with a velocity of 500 m/s. The gun is aimed horizontally and fired from a height of 1.5 m. How far does t

MrMuchimi

The bullet travels a horizontal distance of 276.5 m

The bullet is shot forward with a horizontal velocity $u_x$ . It takes a time <em>t</em> to fall a vertical distance <em>y</em> and at the same time travels a horizontal distance <em>x. </em>

The bullet's horizontal velocity remains constant since no force acts on the bullet in the horizontal direction.

The initial velocity of the bullet has no component in the vertical direction. As it falls through the vertical distance, it is accelerated due to the force of gravity.

Calculate the time taken for the bullet to fall through a vertical distance <em>y </em>using the equation,

$y=u_yt+\frac{1}{2} gt^2$

Substitute 0 m/s for $u_y$ , 9.81 m/s²for <em>g</em> and 1.5 m for <em>y</em>.

$y=u_yt+\frac{1}{2} gt^2\\ 1.5 m=(0m/s)t+\frac{1}{2} (9.81m/s^2)t^2\\ t=\sqrt{\frac{2(1.5m)}{9.81m/s^2} } =0.5530s$

The horizontal distance traveled by the bullet is given by,

$x=u_xt$

Substitute 500 m/s for $u_x$ and 0.5530s for t.

$x=u_xt\\ =(500m/s)(0.5530s)\\ =276.5m$

The bullet travels a distance of 276.5 m.

5 0

3 years ago

When two or more different capacitors are connected in series across a potential source, which of the following statement must b

vova2212 [387]

Answer:

C. Each capacitor carries the same amount of charge.

Explanation:

When two or more different capacitors are connected in series across a potential source, each capacitor carries the same amount of charge.

In a series connected capacitor, sane amount of charge flows through the capacitors while different potential difference is passed across them.

The capacitors have the same charge as the charge flowing out directly from the potential source called emf since the emf is the driving force of charge in a circuit.

6 0

3 years ago

How do you make a magnet with wire and electricity ?

AVprozaik [17]

<h2>Answer:</h2>

<u>By wrapping the wire along a solenoid and connecting it to electricity</u>

<h2>Explanation:</h2>

If you wrap a copper wire into coils and run an electrical current through it, you will create a magnetic field. If you rotate a permanent magnet as opposed to an item that has been magnetized inside a coil of copper wire, you can create an electrical current. The strength of magnetic field generated is proportional to the amount of current through the winding.

5 0

3 years ago